The WA312-2912-730 is a PTO hydraulic pump drive gear set built for the 20/30/31 series power take off units. It features a 1 1/4 in. gear bore, matching the drive requirements of these PTO applications. This gear set transfers rotational power from the transmission’s PTO opening to a mounted hydraulic pump.Features20/30/31 Series PTO gear set1 1/4 in. gear borePower Take Off hydraulic pump drive applicationPart number WA312-2912-730Tech Specs20/30/31 Series1 1/4 in. gear bore